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A total of 468 seats in the U.S. Congress will be up for election on November 6, 2012.

Heading into the election, Democrats control the U.S. Senate while Republicans are the majority in the U.S. House. During this presidential election season, partisan dominance of both chambers of the U.S. Congress will be at stake.

U.S. Senate

The 33 Class 1 U.S. Senate seats will be up for election. Of those 33 seats, 23 are currently held by Democrats and 10 by Republican senators. Democrats need to win 21 seats to retain their majority while the GOP needs to win 14 seats to win back the chamber.